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JLibDiff
Class FileData
java.lang.ObjectJLibDiff.FileData
- public class FileData
- extends java.lang.Object
Title: $FileName: FileData.java$
- Version:
- $VerNum: 3$
| Field Summary | |
private boolean[] |
changedFlags
Array, indexed by real origin-1 line number, containing true for a line that is an insertion or a deletion. |
private int[] |
equivs
Vector, indexed by line number, containing an equivalence code for each line. |
private DiffMaker |
maker
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private int |
numLinesInBuffer
Number of elements (lines) in this file. |
private int |
numLinesNotDiscarded
Total number of nondiscarded lines. |
private int[] |
realindexes
Vector mapping virtual line numbers (not counting discarded lines) to real ones (counting those lines). |
private int[] |
undiscarded
Vector, like the previous one except that the elements for discarded lines have been squeezed out. |
| Constructor Summary | |
FileData(java.lang.Object[] data,
java.util.Hashtable h,
DiffMaker maker)
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| Method Summary | |
(package private) void |
clear()
Allocate changed array for the results of comparison. |
private void |
discard(byte[] discards)
Actually discard the lines. |
private byte[] |
discardable(int[] counts)
Mark to be discarded each line that matches no line of another file. |
(package private) void |
discardConfusingLines(FileData f)
Discard lines that have no matches in another file. |
(package private) int[] |
equivCount()
Return equiv_count[I] as the number of lines in this file that fall in equivalence class I. |
private void |
filterDiscards(byte[] discards)
Don't really discard the provisional lines except when they occur in a run of discardables, with nonprovisionals at the beginning and end. |
boolean[] |
getChangedFlags()
Returns the changedFlags. |
int |
getNumLinesInBuffer()
Returns the numLinesInBuffer. |
int |
getNumLinesNotDiscarded()
Returns the numLinesNotDiscarded. |
int[] |
getRealindexes()
Returns the realindexes. |
int[] |
getUndiscarded()
Returns the undiscarded. |
(package private) void |
shift_boundaries(FileData f)
Adjust inserts/deletes of blank lines to join changes as much as possible. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
numLinesInBuffer
private int numLinesInBuffer
- Number of elements (lines) in this file.
equivs
private int[] equivs
- Vector, indexed by line number, containing an equivalence code for
each line. It is this vector that is actually compared with that
of another file to generate differences.
undiscarded
private int[] undiscarded
- Vector, like the previous one except that
the elements for discarded lines have been squeezed out.
realindexes
private int[] realindexes
- Vector mapping virtual line numbers (not counting discarded lines)
to real ones (counting those lines). Both are origin-0.
numLinesNotDiscarded
private int numLinesNotDiscarded
- Total number of nondiscarded lines.
changedFlags
private boolean[] changedFlags
- Array, indexed by real origin-1 line number,
containing true for a line that is an insertion or a deletion.
The results of comparison are stored here.
maker
private DiffMaker maker
| Constructor Detail |
FileData
public FileData(java.lang.Object[] data, java.util.Hashtable h, DiffMaker maker)
| Method Detail |
clear
void clear()
- Allocate changed array for the results of comparison.
equivCount
int[] equivCount()
- Return equiv_count[I] as the number of lines in this file
that fall in equivalence class I.
discardConfusingLines
void discardConfusingLines(FileData f)
- Discard lines that have no matches in another file.
A line which is discarded will not be considered by the actual
comparison algorithm; it will be as if that line were not in the file.
The file's `realindexes' table maps virtual line numbers
(which don't count the discarded lines) into real line numbers;
this is how the actual comparison algorithm produces results
that are comprehensible when the discarded lines are counted.
When we discard a line, we also mark it as a deletion or insertion so that it will be printed in the output.
discardable
private byte[] discardable(int[] counts)
- Mark to be discarded each line that matches no line of another file.
If a line matches many lines, mark it as provisionally discardable.
filterDiscards
private void filterDiscards(byte[] discards)
- Don't really discard the provisional lines except when they occur
in a run of discardables, with nonprovisionals at the beginning
and end.
discard
private void discard(byte[] discards)
- Actually discard the lines.
shift_boundaries
void shift_boundaries(FileData f)
- Adjust inserts/deletes of blank lines to join changes
as much as possible.
We do something when a run of changed lines include a blank
line at one end and have an excluded blank line at the other.
We are free to choose which blank line is included.
`compareseq' always chooses the one at the beginning,
but usually it is cleaner to consider the following blank line
to be the "change". The only exception is if the preceding blank line
would join this change to other changes.
getUndiscarded
public int[] getUndiscarded()
- Returns the undiscarded.
getNumLinesNotDiscarded
public int getNumLinesNotDiscarded()
- Returns the numLinesNotDiscarded.
getChangedFlags
public boolean[] getChangedFlags()
- Returns the changedFlags.
getRealindexes
public int[] getRealindexes()
- Returns the realindexes.
getNumLinesInBuffer
public int getNumLinesInBuffer()
- Returns the numLinesInBuffer.
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SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||